<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    
</body>
<script>
    var str = '1 1 1 1 1 1';
    function th(){
        console.log(''.split.call(str,' '));
        
        return this;
    }
    th();

    var obj = {
        name:'A',
        age:10,
        fun:function(){
            console.log(this.name);
        }
}
var obj2 = {
    name : 'B',
    age:12,
    fun1:function(){
        console.log(this.age);
    }
}
obj.fun.call(obj2);
</script>
</html>